Sewing machine



Feb. 4, 1930.

c; H. T. HAGELSTEIN SEWING MACHINE 2 Sheets-Sheet 1 Filed May 18, 1928 \nQenTorQ Chrisfiun HT. HugelsTein bymMk/W ATF S;

2 Sheets-Sheet 2 SEWING MACHINE Filed May 18. 1928 c. H. T. HAGELSTEIN Feb. 4, 1930. r

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8 22 mum Patented Feb. .4, 1930 UNITEDSIS'SSTATES PATENT OFFICE CHRISTIAN H. T. HAGELSTEIN, OF STOUGHTON, MASSACHUSETTS, ASSIGNOB T REECE I BUTTONHOLE MACHINE j z or MAINE n COMPANY, OF, BOSTON, MASSACHUSETTS, A CORPORATION S WING MACHINE Application filed May 18, 1928. Serial No. 278,664.

7 This invention relates to sewing machines and'has for'its object to provide certain improvements'in sewing machines all aswill be i more fully hereinafter-set forth. n In order to give an understanding of the invention, Ihave illustrated in the drawings a'selected embodiment thereof whichwill now be described, after which the novel features will be pointed-out in the appended loclaimsg j r In the drawings:

Fig. 1 is aside viewof'the sewing machine embodying my invention; jFig. 2 is a section on the line 22 of Fig. 1.

' Fig.8 is a fragmentary perspective view illustrating the latch for holding the clutch controlling rod in operative position.

. Fig.4 is a section on the line 4-4 of Fig. 1.

The sewing machine herein'illustrated is the type coinmonly referred to as a tacker,

this being a sewing machine adapted to sew reinforcing seams at the ends of buttonholes or at the ends of pockets or otheropenings.

The invention, however, is applicable to other types'of sewing machines and is not limited in its use toany particular type of machine.

The machine herein illustrated comprises the main frame 1 having the usual overhanging arm '2 in.which is mounted the needle bar 3 carrying the upper needle 4.

Thisiinain frame is pivotally mounted at 5 upon a base frame 6' whichiis adapted to be supported on the benchor table 7 all as usual in sewing machines of this type. One purpose of pivotally mounting the main frame 1 on the base frame is topermitthe main frame to lee-swung upwardly and backwardly about itspivot, thereby to expose the operative'parts Q th th bed 80f said frame.

One feature ofmypresent'invention relates to'certain improvementsby which the main frame can be .tippe'd' up into an upright position without requiring any preliminary disconnection of the actuating parts' for the clutch The needle 4 is actuated as usual from a shaft 9 journalled in'the main frame and this shaft in" turn is driven from the driving shaft lO'through the medium of spiral gears 11.

.159, The driving 'shaftlQ is driven from adriving pulley 12 through the medium of a suitable clutch which is not shown, but is enclosed in the housing 18 carried by the shaft 10. The clutch is controlled by a clutch cone 14 slid ably mounted on the shaft 10, the constructi on being such that when the cone is moved to the right, Fig. 2, the clutch will be engaged, While when the cone moves to the left, the clutch will be released. This cone is actuated through the medium of a clutch controlling rod 15 that is slidably mounted in the main frame and is provided with a forked arm 16, the fork of which engages in a groove 17 in the clutch controlling cone 14. This-clutch controlling rod 15 is normally'held in its inoperative position by means ofa spring 18 that normally holds it in the dotted line position, Fig. 2, in which position the clutch is'released. The clutch controlling rod 15 is moved to the right or into the full line positi0n,'Fig. 2, to throw the clutch into engagement by means of an actuating lever 19 which is pivoted at 20 on the main frame 1 and the upper end 21 of which engages the end of the rod 15. The lower end of the lever 19 is formed with a cam surface 22 adapted to be engaged by a roll 23 on the end of a lever 24 pivoted at 25 on the base frame 6. Said lever 24 has a link 27 connected thereto which leadsto atreadle or other manually operated element,

When the clutch is disengaged, the actuating lever 19 and'the clutch controlling rod 15 and into the position shown in Fig. 2, which movement throws the clutch into engagement, 1 r. as above described.

A latch is provided for automatically en-' gagingthe rod 15 when it is in its operative position, thereby to hold the clutch in engagement until the sewing operation has been eom- 'iT-m carried by the frame, said latch being adapted to drop into a recess 80 formed in the rod 15 when the rod is carried into its operative position. l a

Theconstruction above described for actuating the clutch controlling rod 1-5 a is such as to permit the main frame; .1- to; be swung about. its-pivot 5-without the necessity of; dis f V V 7 V v 1 the rod so that when the rodiisashl fted nto the, operative position shown in Fig. 2, the

connecting the actuating connections by which the clutch is controlled. WVhen-the main frame is lifted about its pivot, as shown by the dotted lines in Figs. land 2, the cam surface 22 is merely carried away from the roll '23,; and when the" main frame is again brought back into its operative position sai d cam surface will be automaticailywreplaced in its operative position relative to the: roll 2 3. This operation is due to the fact that the levers 19 and 24 are 'not mechanically connected to-,

gethera butmerely have an operative engagement. Theadvantage of this construction is that'nopre-li-mi nary operation of disconnecting the trea'dle from the clutch actuating mechanism ;is required prior 'to swinging the main' frame '1- upwardly-and backwardly'.

-At the 8111Cl-0f earth's-sewing operation the latch 28 is automatically released from the notch or recess 30 and the clutch controlling rod -1-5 is returne'dto its nor'mal or dottedline position by the spring I 18, thus disengaging the clutch. The s'hziftQhasad-islr 31 mounted thereon-providedw itha proj ection 32 adapted to engage' thenoseE 33 -at the upper end of'a vertically sliding 1 rod 34, the latter being mounted; for sliding movement .inbear-ing s-35 and36 rigid with the main fra-me. The lower end of the rod 34 has a toe or lateral projection 37' extending'therefrom, said projection underlying a horizontal arm 38 that is rigid with the 1atclr28. v c

The disk 31 is secured to and is rotated by the cam-47 --which controls the jogging movements of the work "clamp, and :which makes one rotation for each sewing operation as usual in sewing machines ofthistype 'and hence said diskwil'l'rotate once for each sew-n ing operation. The parts aresotimed that at the completion ofthe sewingoperationthe projection 32 wi'll engage the-nose 33' -and thereby lift the r-0d 34, this liftingqmovement causing the toe 87 toengagethearm 38 and; rock the latch backwardlyito: release it from the recess- 30i 1 The rod 34 is actedon by a spring:39:which normally holds it in its lowered position,- said springencircling the rodandbeing confined between the bearing35 and a collar-4O1which is fast/on the rod. iTh-is collar carries a positioning pin 41 which extendsrthrough an opening; in; the bearing; 536'. LOne purpose: of this; positioning pin is: tor prevent the EIOtli 3.4 fronrtnrning about its axis andizthereby insuring-rthatrthe nose33 willvalwaysibeismainshown at 42, the slottedjend receiving a pin 43whic h' extendslaterallyjfrom theiarm 38. The; pin is'provided with an axialspringreceiving recess in which is received a spring .44 that bears-agarnstthe p1n443- Thisspr-lng ma-intainsthe latch yieldinglyinl contact with latch will automatically-drop into the recess position to be engaged by 3O. TherspringAtisaa relatively light spring of just suflici'ent strength to cause the latch 28 to functionzproperlyvand thistsprin gpmaintains a aconstant' spring pressure on the latch evenwhenithecollarf40: is. seated against; the bearing 36. A

' ,JI haveshownv the disk-.31; as adj u stably secured to. the cam" 47 ;so as to; provide Y-ciircum ferenti-al adjustment of the 'yprojection .32.

This ,isprovided for by making the disk; 31 withslots :45 which zreceive-bclamping bolts 46 that clamp the disk to said cam member247. 5

The work to is clamped ii -position between upper andlower clampingmembers 48 and The lower clamping r members -49 are formed on the ends of arms-5O andthe upper clamp-ingmembers=48- areformed on the ends of, arms :51, 2Lll23151 usual in ;-se-wi;ngmachines of this type; i, a V

c In orderrto maintain". each upper2arm: 51 in correct aligmnent with, its lower-arm'.=50, I have formed leach upper "arm with two depending fing-ers 152 whicheembrace Y the lower arm asshQW-n-in Eigs,1 and4. iThese-fingers I permit; the clamping members *to move toward and fromveach other for clamping and unclampi-ng theworkibutmaintain: them al- E05 ways in their proper; position one above the other.

. e Hav-ingi. thus describedithe invention,,what

is, claimed as new, and desired; tot-be secured by Letters Patentyis: 3

1;. "In a sewing machine, the

combination with a main 1 frame: carryi-ng, stitch forming mechanism of'a. clutch. controllingrod on said mainiframe bywhich theoperation of the stitch torming, mechanism is controlled,- an

actuating lever i pivoted 1 to ,the Ina-in frame for operating said rod, :said lever having a camsurface, abaseframe .on whlch the main frame is pivotally mounted av manually: op-

erated lever carriedcby the chase frame and adapted itoaengagei said; cam surface ior opcrating the actuating; lever. p p 7 .2. In ai-sewing-machine,-ithe combination withza t'fraunecarrying-stitch forming-mechanism of a clutch controlling rod slidabl y mounted zinisai'd iframe :zEor controlling the operationoft-the stitch forn-iiingimechanism, said rodihaving'axrecess, n; pivoted :latchfhaving an r armrrigid therewith, i a lat'clrtrelea'sing rod'rhavinga'ttoerto engageasaidaarin said 1 rod.

7' p name to this specification. 

